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- Description: Tested upgrading from GitLab 12.10.12 to 13.0.10 package in a multi-node
configuration. As part of the issue to [Fix zero-downtime upgrade process/instructions for multi-node Geo deployments](https://gitlab.com/gitlab-org/gitlab/-/issues/22568), we monitored for downtime using the looping pipeline, HAProxy stats dashboards, and a script to log readiness status on both nodes.
- Outcome: Partial success because we observed downtime during the upgrade of the primary and secondary sites.
- Follow up issues/actions:
- [Investigate why `reconfigure` and `hup` cause downtime on multi-node Geo deployments](https://gitlab.com/gitlab-org/gitlab/-/issues/228898)
- [Geo multi-node deployment upgrade: investigate order when upgrading non-deploy nodes](https://gitlab.com/gitlab-org/gitlab/-/issues/228954)
[Switch from repmgr to Patroni on a Geo primary site](https://gitlab.com/gitlab-org/gitlab/-/issues/224652):
- Description: Tested switching from repmgr to Patroni on a multi-node Geo primary site. Used [the orchestrator tool](https://gitlab.com/gitlab-org/gitlab-orchestrator) to deploy a Geo installation with 3 database nodes managed by repmgr. With this approach, we were also able to address a related issue for [verifying a Geo installation with Patroni and PostgreSQL 11](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5113).
- Outcome: Partial success. We enabled Patroni on the primary site and set up database replication on the secondary site. However, we found that Patroni would delete the secondary site's replication slot whenever Patroni was restarted. Another issue is that when Patroni elects a new leader in the cluster, the secondary site will fail to automatically follow the new leader. Until these issues are resolved, we cannot officially support and recommend Patroni for Geo installations.
- Follow up issues/actions:
- [Investigate permanent replication slot for Patroni with Geo single node secondary](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5528)
- [Investigate if documentation should be modified to include refresh foreign tables task](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5041).
- [`revert-pg-upgrade` fails to downgrade the PostgreSQL data of a Geo secondary's standalone tracking database](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5243).
[Test failover with object storage replication enabled](https://gitlab.com/gitlab-org/gitlab/-/issues/330362):
- Description: At the time of testing, Geo's object storage replication functionality was in beta. We tested that object storage replication works as intended and that the data was present on the new primary after a failover.
- Outcome: The test was successful. Data in object storage was replicated and present after a failover.
- Follow up issues:
- [Geo: Failing to replicate initial Monitoring project](https://gitlab.com/gitlab-org/gitlab/-/issues/330485)
[Test Gitaly Cluster on a Geo Deployment](https://gitlab.com/gitlab-org/gitlab/-/issues/223210):
- Description: Tested a Geo deployment with Gitaly clusters configured on both the primary and secondary Geo sites. Triggered automatic Gitaly cluster failover on the primary Geo site, and ran end-to-end Geo tests. Then triggered Gitaly cluster failover on the secondary Geo site, and re-ran the end-to-end Geo tests.
- Outcome: Successful end-to-end tests before and after Gitaly cluster failover on the primary site, and before and after Gitaly cluster failover on the secondary site.
